Schedule
TinyAGI/tinyagi
Create, list, and delete scheduled tasks (recurring or one-time) that send messages to agents.
Master OpenClaw's timing systems. An agent skill from sundial-org/awesome-openclaw-skills.
Install Cron Mastery
$ npx skills add sundial-org/awesome-openclaw-skills --skill cron-mastery -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install sundial-org/awesome-openclaw-skills cron-mastery --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/sundial-org/awesome-openclaw-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/cron-mastery .claude/skills/cron-mastery && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "cron-mastery" agent skill from https://github.com/sundial-org/awesome-openclaw-skills/tree/main/skills/cron-mastery into .claude/skills/cron-mastery/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cron-mastery", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/sundial-org/awesome-openclaw-skills/tree/main/skills/cron-masteryType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add sundial-org/awesome-openclaw-skills --skill cron-mastery -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install sundial-org/awesome-openclaw-skills cron-mastery --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sundial-org/awesome-openclaw-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/cron-mastery .agents/skills/cron-mastery && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "cron-mastery" agent skill from https://github.com/sundial-org/awesome-openclaw-skills/tree/main/skills/cron-mastery into .agents/skills/cron-mastery/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cron-mastery", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add sundial-org/awesome-openclaw-skills --skill cron-mastery -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install sundial-org/awesome-openclaw-skills cron-mastery --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sundial-org/awesome-openclaw-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/cron-mastery .cursor/skills/cron-mastery && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "cron-mastery" agent skill from https://github.com/sundial-org/awesome-openclaw-skills/tree/main/skills/cron-mastery into .cursor/skills/cron-mastery/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cron-mastery", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/sundial-org/awesome-openclaw-skills.git --path skills/cron-mastery--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add sundial-org/awesome-openclaw-skills --skill cron-mastery -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install sundial-org/awesome-openclaw-skills cron-mastery --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sundial-org/awesome-openclaw-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/cron-mastery .gemini/skills/cron-mastery && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "cron-mastery" agent skill from https://github.com/sundial-org/awesome-openclaw-skills/tree/main/skills/cron-mastery into .gemini/skills/cron-mastery/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cron-mastery", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install sundial-org/awesome-openclaw-skills cron-masteryInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add sundial-org/awesome-openclaw-skills --skill cron-mastery -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/sundial-org/awesome-openclaw-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/cron-mastery .github/skills/cron-mastery && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "cron-mastery" agent skill from https://github.com/sundial-org/awesome-openclaw-skills/tree/main/skills/cron-mastery into .github/skills/cron-mastery/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cron-mastery", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add sundial-org/awesome-openclaw-skills --skill cron-mastery -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install sundial-org/awesome-openclaw-skills cron-mastery --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/sundial-org/awesome-openclaw-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/cron-mastery .opencode/skills/cron-mastery && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "cron-mastery" agent skill from https://github.com/sundial-org/awesome-openclaw-skills/tree/main/skills/cron-mastery into .opencode/skills/cron-mastery/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "cron-mastery", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
cron-mastery- GitHub stars
- 663
- Used in
- 1 other repo
- Token cost
- ~919 tokens
- SKILL.md length
- 432 words
- Files
- 2 (incl. references)
- Skills in repo
- 383
- Repo updated
- First seen
- Licence
- None found
At a glance
Master OpenClaw's timing systems. An agent skill from sundial-org/awesome-openclaw-skills.
- Works in 4 steps: Setting Reliable Reminders → The Janitor (Auto-Cleanup) → Reference: Timezone Lock → …
- Scheduling reliable reminders
- SKILL.md covers The Core Principle, 1. Setting Reliable Reminders, 2. The Janitor (Auto-Cleanup) and 3. Reference: Timezone Lock, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Cron Mastery is an agent skill from sundial-org/awesome-openclaw-skills. Master OpenClaw's timing systems. Use for scheduling reliable reminders, setting up periodic maintenance (janitor jobs), and understanding when to use Cron vs Heartbeat for time-sensitive tasks.
Its SKILL.md is about 920 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/TEMPLATES.md`).
It sits in Productivity & Automation, covering Scheduled and recurring tasks. The repository describes itself as: Top OpenClaw skills, with the most popular and useful ones.
When your agent uses it
- Scheduling reliable reminders
- Setting up periodic maintenance (janitor jobs)
- Understanding when to use Cron vs Heartbeat for time-sensitive tasks
Example prompts
- “/cron-mastery”
Workflow steps
4 steps, taken from the step headings in SKILL.md.
- Setting Reliable Reminders
- The Janitor (Auto-Cleanup)
- Reference: Timezone Lock
- The Self-Wake Rule (Behavioral)
What it can do on your machine
Read from SKILL.md and the folder at commit b80cde2. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are json).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Cron Mastery loads about 919 tokens when it runs, and up to ~1.4k if it reads all its reference files. Until then it costs about 52 tokens; SKILL.md has 432 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Without a licence we can't republish the file, so here is its outline and opening line. It has 432 words (~919 tokens).
“Rule #1: Heartbeats drift. Cron is precise.”
- name
- cron-mastery
Files
SKILL.md and 1 other file (references) in skills/cron-mastery of sundial-org/awesome-openclaw-skills.
- SKILL.md
- references/TEMPLATES.md
Open the folder on GitHubat commit b80cde2
Used in 1 other repository
We found 1 copy of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in sundial-org/awesome-openclaw-skills, which our catalogue first saw on October 7, 2026.
Compare with similar skills
Cron Mastery next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Cron Mastery this skillsundial-org/awesome-openclaw-skills | 663 | 1 repos | ~919 | Automated safety check: Pass | None | |
| ScheduleTinyAGI/tinyagi | 3.6k | — | ~1.4k | Automated safety check: Pass | MIT | |
| Send User MessageTinyAGI/tinyagi | 3.6k | — | ~829 | Automated safety check: Pass | MIT | |
| Cron Opsczl9707/build-your-own-openclaw | 1.9k | — | ~593 | Automated safety check: Pass | MIT | |
| X Bookmarkssharbelxyz/x-bookmarks | 289 | — | ~2k | Automated safety check: Notes | None | |
| Wp Wpcli And OpsAutomattic/agent-skills | 211 | 2 repos | ~988 | Automated safety check: Pass | None |
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X Bookmarks
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Related
Categories
Questions about Cron Mastery
What does Cron Mastery do?
Master OpenClaw's timing systems. An agent skill from sundial-org/awesome-openclaw-skills. Cron Mastery is an agent skill from sundial-org/awesome-openclaw-skills. Master OpenClaw's timing systems.
When should I use Cron Mastery?
Cron Mastery fits situations like: scheduling reliable reminders; setting up periodic maintenance (janitor jobs); understanding when to use Cron vs Heartbeat for time-sensitive tasks.
How do I install Cron Mastery in Claude Code?
Run `npx skills add sundial-org/awesome-openclaw-skills --skill cron-mastery -a claude-code`. Or copy the skill folder (skills/cron-mastery in sundial-org/awesome-openclaw-skills) into .claude/skills/cron-mastery in your project. Claude Code loads it when a task matches its description.
How do I install Cron Mastery in Codex?
Run `npx skills add sundial-org/awesome-openclaw-skills --skill cron-mastery -a codex`. Or copy the skill folder (skills/cron-mastery in sundial-org/awesome-openclaw-skills) into .agents/skills/cron-mastery in your project. Codex loads it when a task matches its description.
Can I use Cron Mastery in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add sundial-org/awesome-openclaw-skills --skill cron-mastery -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/cron-mastery, .gemini/skills/cron-mastery, .github/skills/cron-mastery and .opencode/skills/cron-mastery in your project.
What does Cron Mastery need to run?
SKILL.md names no scripts, command-line tools or credentials: Cron Mastery is instructions for the agent only.
Does Cron Mastery access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Cron Mastery safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Cron Mastery use?
No licence was found for Cron Mastery or its repository. Without one, default copyright applies: ask the author before reusing or redistributing it.
How many tokens does Cron Mastery use?
About 919 tokens (SKILL.md is roughly 3.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 439 tokens, read only when the agent opens those files.
What are the alternatives to Cron Mastery?
Skills that share tags, products or a category with Cron Mastery: Schedule (TinyAGI/tinyagi, 3.6k stars), Send User Message (TinyAGI/tinyagi, 3.6k stars), Cron Ops (czl9707/build-your-own-openclaw, 1.9k stars) and X Bookmarks (sharbelxyz/x-bookmarks, 289 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Cron Mastery?
sundial-org (a GitHub organization) maintains it in sundial-org/awesome-openclaw-skills, which has 663 GitHub stars. The repository holds 383 skills in this directory. The repository was last updated on March 7, 2026.
Source: sundial-org/awesome-openclaw-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.